[HowTo] Wastegate Actuator Arm Adjustment - Hyundai Genesis Forum
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post #1 of 27 Old 06-03-2009, 10:23 AM Thread Starter
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[HowTo] Wastegate Actuator Arm Adjustment

So in our never ending quest to find free mods, Hyundai has yet again kicked butt and deciced to give us an adjustable wastegate actuator. What this does is allow us to change the preload on the wastegate itself, which will allow the car to hold more boost. I was a bit doubtful that it would work on our cars because of the more sophisticated ECUs...i was worried it would still do whatever it needed to do to maintain target boost and thus net no gain. So far so good though, car immediately held more boost and gained torque. Unfortunately the dyno guys didnt have the boost sensor hooked up so we could see the actual before and after psi difference, but the dyno definitely speaks. There is definitely a spike in there but i think that is just from us not resetting the ECU and not giving the car anytime to learn. Hopefully once it learns it will smooth it out.


On to the HowTo

1. Remove Turbo heat shield (3) 10mm Bolts
2. Loosen the 10mm Nut that locks the end of the wastegate actuator arm. Back it up to about the end of the threads.
3. Take off the "C-Clip" with a pliers. Be careful and this will like to fly off while you are taking it off and you dont want to lose this.
4. Lift the "swivel bracket" off of the wastegate flapper door bracket. This is the part that we will be turning to shorten the overall length of the wastegate actuator arm.
5. Turn the "swivel bracket" clockwise, as if you were sitting behind the turbo looking at the front of the car. We turned it 2.5 complete turns but i would suggest turning 1.5 times or so and see how the car responds.
6. Place "Swivel bracket" back on wastegate flapper door bracket.
7. Replace "C-Clip".
8. Tighten 10mm Nut.
9. Replace turbo heat sheild (3) 10mm Bolts.





And on to the results. This is OEM vs. OEM w/ wastegate arm adjustment. Literally taken 10 minutes apart.



Justin
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post #2 of 27 Old 06-03-2009, 11:04 AM
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Holy crap, that is too easy.
I wonder if this along with the Buschur boost controler together will now net more gains?
Thanks for the update Grimmspeed & the how to.
I'm going to move this to the DIY section.

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post #3 of 27 Old 06-03-2009, 11:45 AM
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that's an odd little dip at around 3400rpm, but otherwise it looks like good gains for a free adjustment.
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post #4 of 27 Old 06-03-2009, 11:49 AM
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I can personally vouch for this as well. I gave mine a few turns the day after I got my car as well as adding the Buschur MBC and it seems to have a nice linear pull with a noticeable reading on my butt dyno as well.

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post #5 of 27 Old 06-03-2009, 06:52 PM Thread Starter
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Quote:
Originally Posted by Tufast View Post
Holy crap, that is too easy.
I wonder if this along with the Buschur boost controler together will now net more gains?
Thanks for the update Grimmspeed & the how to.
I'm going to move this to the DIY section.
you're welcome!

Quote:
Originally Posted by willyolio View Post
that's an odd little dip at around 3400rpm, but otherwise it looks like good gains for a free adjustment.
yeah not entirely sure what that is from. given the fact that we didnt let the ECU learn really at all that dip is probably the ECU learning.

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post #6 of 27 Old 08-12-2009, 10:25 AM
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So I can do this free mod on my stock engine and gain that much....for free? without hurting my engine? also i'm new to turbos so i got another question, after the filter box their is a little plastic pimple on the hose that you can take off if u loosen it....what is it and what "should" go there to help the turbo?
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post #7 of 27 Old 08-12-2009, 10:32 AM
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Yes this is a free mod that will not hurt the engine in any way (so long as you follow the directions Grimm put together). The little plastic nipple in the intake tube is a silencer and the thing to do with that is take it out and flip it so the closed side is placed inside the hole and is flush with the inside of the intake tube. All that does is provides a less turbulent air path as well as eliminating the silencing effect it has on the intake.

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post #8 of 27 Old 08-12-2009, 12:37 PM
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Alright so i didn't wait for an answer and tried it out. I wasn't sure I was turning the arm the right way until. I gave it a turn in a half and took her for a spin. The acceleration was definetely quicker and the turbo felt like it was kicking in more. I popped into fourth before i passed my house after pulling out of the driveway! I think i'm gonna take it a half back just to feel the difference....then maybe up a bit more..)
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post #9 of 27 Old 08-29-2009, 09:34 AM Thread Starter
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Hey Spencer, sorry someone didnt get back to you. For some reason this thread wasnt on our subscribed list.

Justin
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post #10 of 27 Old 08-29-2009, 01:01 PM
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nice now I know what my first mod will be.

not so patently waiting on R-spec
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